Improved dooe-bell



C. PENFlEL-D.

Door Bell.

No. 67,212. Patented July 30, 1867.

N PEYERS. PNOTO-LITKOGRAPHER. WASHINGTON D c @nitrh gram gaunt @ffirr.

mruovsn DOOR-BELL.

Lil e Srlgrtulr nfmct tn in time some $21M mm making out at tin-same.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, CHESTER. PENFIELD, of New Britain, county of Hartford, and State of Connecticut, have invented certain new and useful Improvements inthe Manufacture of Door or Call-Bells; and to enable others skilled in the art to make and use the same I will proceed to describe by referring to the drawings, iu-which the same figures or letters indicate like parts in each of the figures.

The nature of this invention consists in arranging or securing a revolving prong cam in close proximity with a. strikingdevice, so that when a wire or spindle is pulled one prong will .brace itself while the other or opposite prong ac tuates the hammer. The object of this invention is to cheapen the manufacture and produce a superior article for use. In the accompanying drawings- Figure 1 is a sectional view thereof. I Figure '2 is a face view of the plate, with the mechanism arranged thereon. a is the plate, to or upon which the mechanism is arranged and secured. ais the projecting stem, upon the outer end of which the bell a is attached. a is a hub, upon which the hammeris arranged and vibrates. Underlying this hammer, and upon the hub c, isa spiral arm spring, a. One end of the wire (of which this spring is formed) re'sts against a detent, 0, while a hook, 0', upon the outer or other end of said spiral arm spring, takes hold of and actuates the hammer-rod d. e is a stop or detent hub formed on the plate a, against which the'actuating arm 0" of the hammer takes its bearing and controls the position of the hammer (while at rest) relative to the point on the bell where it (the hammer) strikes by its vibration, all constructed very much in the usual way. his 2. prong cam arranged relatively to the pull spindle or operating mechanism so as to revolve partially, or one prong at each pull thereof. When the knob, wire, or spindle is pulled, one prong or foot of the cam takes its bearing upon the fa ceof the plate ajust one side of the orifice in said platc, (through which it plays and revolves,) while the opposite prong thereof acts or crowds against the side of the outer end of the actuating arm of the hammer until the end of the prongor cam passes by said projecting arm,' vhen the hammer, by the impetus of the spring and the vibration of its arm, will strike the bell each pull of the knob, wire, or spindle. Thus I am enabled to produce a cheap, simple, and ,efiicient door or call-bell.

I believe I have thus shown the nature, construction, and advantage of this invention so as to enable -others skilled to manufacture the same therefrom.

What I claim, therefore, and desirc to secure by Letters Patent, is

The revolvingprong cam 71, in combination with mechanism for strikinga bell, substantially in the manner as described.

CHESTER -PENFIELD. [L. 5.]

Witnesses:

JEREMY W. Buss, Tnomss G. Kuleur. 

